html {
    background: #ededed;
}

.content {
    width: 100%;
    .brief {
        padding: 5px;
        padding-bottom: 0;
        .briefn {
            border-radius: 5px;
            border: 1px solid #ccc;
            .fl_t {
                a {
                    display: block;
                    height: 40px;
                    line-height: 40px;
                    padding-left: 10px;
                    background: #ededed;
                    border-bottom: 1px solid #ccc;
                }
                ul {
                    overflow: hidden;
                    background-color: #fff;
                    border-bottom: 1px solid #ccc;
                    display: none;
                    li {
                        width: 33.333%;
                        float: left;
                        border: 1px solid #ccc;
                        box-sizing: border-box;
                        a {
                            border: none;
                            background-color: #fff;
                        }
                    }
                }
            }
        }
    }
}